Select your answer:
Topics:
The Vascular System and Blood Flow Nutrition Cell Injury Regulation of Urine Formation Brain Fainting and Nosebleed Pediatrics Nervous & Endocrine Systems Heredity and Living Cells Body Systems and Medical Sciences Nutrition and Calorific Value Geriatrics Pathogens, Disease and Immunity Digestive System and Nutrition Hematology / OncologyOther quiz:
Inheritance › ViewOne form of a gene is called_______________
A. a DNA
B. a Phenotype
C. a trait
D. an allele
Circulatory / Respiratory › View
Which structure initiates a heartbeat?
A. AV node
B. SA node
C. left ventricle
D. left atrium
E. right ventricle